A Very Ecumenical Christmas
Why conservatives despise the phrase happy holidays.
David Greenberg, a professor of history and media studies at Rutgers and author of three books of political history, has written the "History Lesson" column since 1998.
Illustration by Robert Neubecker. Photograph of Dwight D. Eisenhower on Slate's home page by Fabian Bachrach, copyright Corbis.